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I can't install Microsoft Security EssentialsDownloaded mseinstall.exe, MSEInstall Package version 4.1.522.0 to PC running Windows 7; ran installation wizard and it could not complete the Security Essentials installation. Error code 0x80070643 :(
Clicked link to "Get help on this issue." It said either some other security programs are...

System Security

Microsoft Security Essentials Install IssueI need some help here. I have just downloaded Windows Security Essentials for a perfectly genuine version of Windows 7 Ultimate 64 Bit. Unfortunately, during the point of validation during the installation, a window comes up saying: "Windows Security Essentials Setup has stopped working."
Here...

System Security

xp mode: 2nd install of Microsoft Security Essentials?From everything I've read, xp mode requires a separate install of an antivirus than Windows 7. Is there a way to have XP mode run the Microsoft Security Essentials stored in Windows 7? That way, there are two instances of the MSE processes (one set of them in the XP mode virtual machine), but...